Mushrooming bullet.



Patented May 27, 1913.

T. O. JOHNSON.

MUSHROOMING BULLET.

APPLICATION FILED JAN. 14, 1913.

1 lifitlll, fill. T

UNITED STATES [PATENT oFFioE.

THOMAS C. JOHNSON, or NEW HAVEN, CONNECTICUT, ASSIGNOR To WINCHESTER REPEATING ARMS co., E NEW HAVEN, CoNNECTICUT, A CORPORATION.

MUSHROOMIN G BULLET.

Specification of Letters Patent.

Application filed January 14, 1913. Serial No. 741,918.

To all whom it may concern:

a citizen of the United States, residing at New Haven, in. the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Mushrooming Bullets; and I do hereby declare the following, when taken. in connection with the accompanying drawings and'the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, 1n 1 Figure 1 a view in central longitudinal section of a slug and jacket .assembled preparatory to being closed together. Fig 2 a plan view thereof. Fig. 3 a View in central longitudinal section of the finished bullet. Fig. 4' a plan view thereof. Fig. 5 a

view of the bullet in central longitudinal section showing one form which it may take on mushrooming. Fig. 6 a plan view thereof. r

My invention relates to an improvement in that class of bullets known as mushrooming bullets'onv account of being con-' structed with particular reference to flat.- tening at the nose at the moment of 1mpinging upon the object fired at, the purpose 'of'my present invention being to produce a mushrooming bullet which will not be deformed in handling or in the gun, and which parts with none-ofitslead 0n mushrooming;

.With these ends in view, my invention consists in a mushrooming bullet consisting ofa soft-metal slug, and a jacket inclosing the same, the forward end walls of the jacket being reduced 'inthickness and projecting beyond. the forward end of the slug to form a chamber in front of the same.

My invention further resides in a mush.-

rooming bullet consisting of afsoft-metal slug formed in its outer end with'a concentric cavity the inner end of which is enlarged to facilitate the mushrooming of the slug, and a. drawn sheet-metal jacket 'having'its forward end made enough longer than the slug to form a chamber in front of the said cavity in the slug and in line therewith.

My invention further consists in a mushrooming bullet having certain details of Be it known that I, THOMAS C. JoHNsoN,.

cavity 3 the forward end of which is con tracted, which has tapering walls 4 and which may be described as having the general outline of an ordinary. milk bottle, though I do not limit myself to that form. By making the inner end of the cavity in the slug larger than its outer end, I greatly facilitate the mushrooming of the bullet by providing ample space forthe walls of the cavity to be folded into upon themselves,

as it were. This slugis inserted into a drawn sheet-metal cylindrical jacket 5 longer than the, said slug and having its I projecting forward end reduced, in thick-,

ness as at 6. The said slug 2 and jacket 5 when combined as shown in Fig. 1, are subjected to an assembling operation inwhich" .the projecting forward end of. the jacket 5 is contracted to form a curved conical, thinwalled polnt 7 inclosing an empty'chamber 8 located entirely in front of the forward end of the slug which is also contracted to transform its beaker-like cavity 3 "into a bottle-shaped cavity 9. -At the same time a conical cavity. 10 is formed in the buttend of the bullet to assist in crowding the lead to a bearing at both ends thereof.

When the point of such a bullet impinges upon the objectfired at, the thin walls 6 of the hollow point 7 collapse as well as the lead wall 4 surrounding the cavity 9 of the slug 2. As the said walls 6 of the jacket and the walls 4 of the slug mush room or collapse, they spread outward and hang over the straight sides of the bullet as shownin Fig. 5, the over-hanging or mushroomed portion 11 of the bullet being supported by the thicker portion 12 of the jacket. As shown, and preferably, the side walls of the jacket are interiorly reduced in thickness from their inner to their outer ends. But it is not essential that the walls of the jacket be reduced in thickness at points beyond the slug. On account of the contraction of the outer end oft-he cavity 3 in the slug 2, theforward end of the slug breaks down and spreads outwardly when the bullet strikes.

I wish in particular to call attention to the fact that inasmuch as the soft-metal slug 2 is entirely inclosed by the jacket 5, none of the soft-metal escapes at the time the bullet ismushroomed, so that the bullet has the same weight when mushroomed as it had initially, whereas muShI'OOming bullets in which the lead is exposed at the nose, generally lose a portion of the lead and are less effective on that account.

I claim 1. As a new article of manufacture, a

mushrooming bullet ccnsistin of a softmetal slug and a jacket inclosing the same, the forward end walls of the jacket being reduced in thickness and projecting sufficiently beyond the forward end of the slug to form a hollow chamber in front of the same. a

2. As a new article of manufacture, a mushrooming bullet consisting of a softmetal slug having a cavity in its outer end, and a drawn sheet-metal jacket having its forward end reduced in thickness and made enough longer than the slug to form a hollow chamber in front of the cavity in the slug and in line therewith.

3. As a new article of manufacture, a mushrooming bullet consisting of a softmetal slug-formed in its outer end with a cavity, and a sheet-metal jacket having its side walls reduced in thickness from end to end and made longer than the slug to project beyond the forward end thereof to produce when contracted a hollow thin-walled chamber in front of the cavity in the slug.

4. As a new article of manufacture, a mushrooming bullet consisting of a softmetal slug formed in its outer end with a concentric cavity the inner end of which is larger than its outer end for facilitating the mushrooming of the slug, and a sheet-metal jacket projecting beyond the forward end of the slug and forming a hollow chamber in front of the said cavity therein.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

THOMAS C. JOHNSON.

Witnesses:

FRANK-A. PAUL, DANIEL H. VEADER. 

